| Challenge: | Existing methods do not correlate strongly with human annotations. |
| Approach: | They propose a method that measures the probability that a language model will continue the conversation with a fixed set of follow-ups. |
| Outcome: | The proposed method achieves the highest correlation with human evaluations when compared against twelve existing methods. |
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| Challenge: | Existing metrics for dialog evaluation are trained on human annotations, which is cumbersome to collect. |
| Approach: | They propose to use user sentiment and other information as proxy to measure the quality of previous dialogs. |
| Outcome: | The proposed model is comparable to models trained on human annotated data. |
Designing Precise and Robust Dialogue Response Evaluators (2020.acl-main)
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| Challenge: | Existing automated dialogue response evaluators have only moderate correlation with human judgement and are not robust. |
| Approach: | They propose to build a reference-free dialogue response evaluator that exploits the power of semi-supervised training and pretrained (masked) language models. |
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Learning an Unreferenced Metric for Online Dialogue Evaluation (2020.acl-main)
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| Challenge: | Existing tools for dialogue evaluation do not generalize to unseen datasets and/or need a human-generated reference response during inference. |
| Approach: | They propose an unreferenced automated dialogue evaluation metric that uses large pre-trained language models to extract latent representations of utterances and leverages the temporal transitions that exist between them. |
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Achieving Reliable Human Assessment of Open-Domain Dialogue Systems (2022.acl-long)
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| Challenge: | Evaluation of open-domain dialogue systems is challenging and unreliable . human evaluation of live conversations is highly reliable, but reliability cannot be assumed . |
| Approach: | They propose a method of open-domain dialogue evaluation that is highly reliable . they compare live conversations with models that avoid pre-created reference dialogues . |
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Evaluating Open-Domain Dialogues in Latent Space with Next Sentence Prediction and Mutual Information (2023.acl-long)
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| Challenge: | Existing evaluation methods for open-domain dialogues are difficult due to the one-to-many issue of the open- domain dialogues. |
| Approach: | They propose a learning-based automatic evaluation metric which can robustly evaluate open-domain dialogues by augmenting CVAEs with a Next Sentence Prediction objective and employing Mutual Information to model the semantic similarity of text in the latent space. |
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Improving Automated Evaluation of Open Domain Dialog via Diverse Reference Augmentation (2021.findings-acl)
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| Challenge: | Prior work has shown that having multiple valid references is important for automated evaluations. |
| Approach: | They propose a technique for automatically expanding a human generated reference to a set of candidate references. |
| Outcome: | The proposed method improves correlations between human-generated metrics and human ratings of system outputs. |
Soda-Eval: Open-Domain Dialogue Evaluation in the age of LLMs (2024.findings-emnlp)
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| Challenge: | Current evaluation practices of open domain dialogue systems are still highly dependent on human evaluation. |
| Approach: | They propose to use an annotated dataset to evaluate chatbots using large language models. |
| Outcome: | The proposed model improves over few-shot inferences on a GPT-3.5 generated dialogue dataset. |
REAM♯: An Enhancement Approach to Reference-based Evaluation Metrics for Open-domain Dialog Generation (2021.findings-acl)
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| Challenge: | Existing evaluation metrics for open-domain dialogue systems are limited by the diversity of possible outcomings. |
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RADE: Reference-Assisted Dialogue Evaluation for Open-Domain Dialogue (2023.acl-long)
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| Challenge: | Evaluating open-domain dialogue systems is challenging because of the one-to-many problem. |
| Approach: | They propose a reference-based dialogue evaluation approach that leverages the pre-created utterance as reference other than the gold response to relieve the one-to-many problem. |
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xDial-Eval: A Multilingual Open-Domain Dialogue Evaluation Benchmark (2023.findings-emnlp)
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| Challenge: | Currently, human evaluation is the most reliable way to holistically judge the quality of the dialogue. |
| Approach: | They propose to use English dialogue evaluation metrics to generalize them to other languages. |
| Outcome: | The proposed metrics outperform OpenAI’s ChatGPT in terms of average Pearson correlations over all datasets and languages. |